Display screen or portion thereof with a graphical user interface



A portion of the disclosure of this patent document contains material to which a claim for copyright is made. The copyright owner has no objection to the facsimile reproduction by anyone of the patent document or the patent disclosure, as it appears in the Patent and Trademark Office patent file or records, but reserves all other copyright rights whatsoever.

FIG. 1 is a front view of a first embodiment of a display screen or portion thereof with a graphical user interface; and,

FIG. 2 is a front view of a second embodiment of a display screen or portion thereof with a graphical user interface.

The dashed broken lines showing the display screen or portion thereof form no part of the claimed design. The remaining broken lines showing portions of the graphical user interface form no part of the claimed design. 

CLAIM The ornamental design for a display screen or portion thereof with a graphical user interface, as shown and described. 